/Engine/Source/Editor/SequencerCore/Public/MVVM/Views/STrackAreaView.h
Called during drag and drop when the the mouse is being dragged over a widget.
A reply that indicated whether this event was handled.
virtual [FReply](API\Runtime\SlateCore\Input\FReply) OnDragOver ( const [FGeometry](API\Runtime\SlateCore\Layout\FGeometry) & MyGeometry, const [FDragDropEvent](API\Runtime\SlateCore\Input\FDragDropEvent) & DragDropEvent )